package cn.fuck;

import java.io.EOFException;
import java.io.IOException;

public class TextThrow {
    // 读取
    public void read(StringBuffer s) throws IOException {
        // 无法达到预期读取长度
        if (s.length() < 2000) {
            throw new EOFException();
        }
    }
    public static void main(String[] args) {
        System.out.println(null instanceof Object);
    }
}
